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path: root/drivers/ddr/mvebu/xor.c
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Diffstat (limited to 'drivers/ddr/mvebu/xor.c')
-rw-r--r--drivers/ddr/mvebu/xor.c436
1 files changed, 436 insertions, 0 deletions
diff --git a/drivers/ddr/mvebu/xor.c b/drivers/ddr/mvebu/xor.c
new file mode 100644
index 0000000..66c96ae
--- /dev/null
+++ b/drivers/ddr/mvebu/xor.c
@@ -0,0 +1,436 @@
+/*
+ * Copyright (C) Marvell International Ltd. and its affiliates
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#include <common.h>
+#include <i2c.h>
+#include <spl.h>
+#include <asm/io.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/soc.h>
+
+#include "xor.h"
+#include "xor_regs.h"
+
+static u32 xor_regs_ctrl_backup;
+static u32 xor_regs_base_backup[MAX_CS];
+static u32 xor_regs_mask_backup[MAX_CS];
+
+static void mv_xor_hal_init(u32 chan_num);
+static int mv_xor_cmd_set(u32 chan, int command);
+static int mv_xor_ctrl_set(u32 chan, u32 xor_ctrl);
+
+void mv_sys_xor_init(MV_DRAM_INFO *dram_info)
+{
+ u32 reg, ui, base, cs_count;
+
+ xor_regs_ctrl_backup = reg_read(XOR_WINDOW_CTRL_REG(0, 0));
+ for (ui = 0; ui < MAX_CS; ui++)
+ xor_regs_base_backup[ui] = reg_read(XOR_BASE_ADDR_REG(0, ui));
+ for (ui = 0; ui < MAX_CS; ui++)
+ xor_regs_mask_backup[ui] = reg_read(XOR_SIZE_MASK_REG(0, ui));
+
+ reg = 0;
+ for (ui = 0; ui < (dram_info->num_cs + 1); ui++) {
+ /* Enable Window x for each CS */
+ reg |= (0x1 << (ui));
+ /* Enable Window x for each CS */
+ reg |= (0x3 << ((ui * 2) + 16));
+ }
+
+ reg_write(XOR_WINDOW_CTRL_REG(0, 0), reg);
+
+ /* Last window - Base - 0x40000000, Attribute 0x1E - SRAM */
+ base = (SRAM_BASE & 0xFFFF0000) | 0x1E00;
+ reg_write(XOR_BASE_ADDR_REG(0, dram_info->num_cs), base);
+ /* Last window - Size - 64 MB */
+ reg_write(XOR_SIZE_MASK_REG(0, dram_info->num_cs), 0x03FF0000);
+
+ cs_count = 0;
+ for (ui = 0; ui < MAX_CS; ui++) {
+ if (dram_info->cs_ena & (1 << ui)) {
+ /*
+ * Window x - Base - 0x00000000, Attribute 0x0E - DRAM
+ */
+ base = 0;
+ switch (ui) {
+ case 0:
+ base |= 0xE00;
+ break;
+ case 1:
+ base |= 0xD00;
+ break;
+ case 2:
+ base |= 0xB00;
+ break;
+ case 3:
+ base |= 0x700;
+ break;
+ }
+
+ reg_write(XOR_BASE_ADDR_REG(0, cs_count), base);
+
+ /* Window x - Size - 256 MB */
+ reg_write(XOR_SIZE_MASK_REG(0, cs_count), 0x0FFF0000);
+ cs_count++;
+ }
+ }
+
+ mv_xor_hal_init(1);
+
+ return;
+}
+
+void mv_sys_xor_finish(void)
+{
+ u32 ui;
+
+ reg_write(XOR_WINDOW_CTRL_REG(0, 0), xor_regs_ctrl_backup);
+ for (ui = 0; ui < MAX_CS; ui++)
+ reg_write(XOR_BASE_ADDR_REG(0, ui), xor_regs_base_backup[ui]);
+ for (ui = 0; ui < MAX_CS; ui++)
+ reg_write(XOR_SIZE_MASK_REG(0, ui), xor_regs_mask_backup[ui]);
+
+ reg_write(XOR_ADDR_OVRD_REG(0, 0), 0);
+}
+
+/*
+ * mv_xor_hal_init - Initialize XOR engine
+ *
+ * DESCRIPTION:
+ * This function initialize XOR unit.
+ * INPUT:
+ * None.
+ *
+ * OUTPUT:
+ * None.
+ *
+ * RETURN:
+ * MV_BAD_PARAM if parameters to function invalid, MV_OK otherwise.
+ */
+static void mv_xor_hal_init(u32 chan_num)
+{
+ u32 i;
+
+ /* Abort any XOR activity & set default configuration */
+ for (i = 0; i < chan_num; i++) {
+ mv_xor_cmd_set(i, MV_STOP);
+ mv_xor_ctrl_set(i, (1 << XEXCR_REG_ACC_PROTECT_OFFS) |
+ (4 << XEXCR_DST_BURST_LIMIT_OFFS) |
+ (4 << XEXCR_SRC_BURST_LIMIT_OFFS));
+ }
+}
+
+/*
+ * mv_xor_ctrl_set - Set XOR channel control registers
+ *
+ * DESCRIPTION:
+ *
+ * INPUT:
+ *
+ * OUTPUT:
+ * None.
+ *
+ * RETURN:
+ * MV_BAD_PARAM if parameters to function invalid, MV_OK otherwise.
+ * NOTE:
+ * This function does not modify the OperationMode field of control register.
+ *
+ */
+static int mv_xor_ctrl_set(u32 chan, u32 xor_ctrl)
+{
+ u32 val;
+
+ /* Update the XOR Engine [0..1] Configuration Registers (XExCR) */
+ val = reg_read(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan)))
+ & XEXCR_OPERATION_MODE_MASK;
+ xor_ctrl &= ~XEXCR_OPERATION_MODE_MASK;
+ xor_ctrl |= val;
+ reg_write(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan)), xor_ctrl);
+
+ return MV_OK;
+}
+
+int mv_xor_mem_init(u32 chan, u32 start_ptr, u32 block_size, u32 init_val_high,
+ u32 init_val_low)
+{
+ u32 tmp;
+
+ /* Parameter checking */
+ if (chan >= MV_XOR_MAX_CHAN)
+ return MV_BAD_PARAM;
+
+ if (MV_ACTIVE == mv_xor_state_get(chan))
+ return MV_BUSY;
+
+ if ((block_size < XEXBSR_BLOCK_SIZE_MIN_VALUE) ||
+ (block_size > XEXBSR_BLOCK_SIZE_MAX_VALUE))
+ return MV_BAD_PARAM;
+
+ /* Set the operation mode to Memory Init */
+ tmp = reg_read(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan)));
+ tmp &= ~XEXCR_OPERATION_MODE_MASK;
+ tmp |= XEXCR_OPERATION_MODE_MEM_INIT;
+ reg_write(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan)), tmp);
+
+ /*
+ * Update the start_ptr field in XOR Engine [0..1] Destination Pointer
+ * Register (XExDPR0)
+ */
+ reg_write(XOR_DST_PTR_REG(XOR_UNIT(chan), XOR_CHAN(chan)), start_ptr);
+
+ /*
+ * Update the BlockSize field in the XOR Engine[0..1] Block Size
+ * Registers (XExBSR)
+ */
+ reg_write(XOR_BLOCK_SIZE_REG(XOR_UNIT(chan), XOR_CHAN(chan)),
+ block_size);
+
+ /*
+ * Update the field InitValL in the XOR Engine Initial Value Register
+ * Low (XEIVRL)
+ */
+ reg_write(XOR_INIT_VAL_LOW_REG(XOR_UNIT(chan)), init_val_low);
+
+ /*
+ * Update the field InitValH in the XOR Engine Initial Value Register
+ * High (XEIVRH)
+ */
+ reg_write(XOR_INIT_VAL_HIGH_REG(XOR_UNIT(chan)), init_val_high);
+
+ /* Start transfer */
+ reg_bit_set(XOR_ACTIVATION_REG(XOR_UNIT(chan), XOR_CHAN(chan)),
+ XEXACTR_XESTART_MASK);
+
+ return MV_OK;
+}
+
+/*
+ * mv_xor_transfer - Transfer data from source to destination on one of
+ * three modes (XOR,CRC32,DMA)
+ *
+ * DESCRIPTION:
+ * This function initiates XOR channel, according to function parameters,
+ * in order to perform XOR or CRC32 or DMA transaction.
+ * To gain maximum performance the user is asked to keep the following
+ * restrictions:
+ * 1) Selected engine is available (not busy).
+ * 1) This module does not take into consideration CPU MMU issues.
+ * In order for the XOR engine to access the appropreate source
+ * and destination, address parameters must be given in system
+ * physical mode.
+ * 2) This API does not take care of cache coherency issues. The source,
+ * destination and in case of chain the descriptor list are assumed
+ * to be cache coherent.
+ * 4) Parameters validity. For example, does size parameter exceeds
+ * maximum byte count of descriptor mode (16M or 64K).
+ *
+ * INPUT:
+ * chan - XOR channel number. See MV_XOR_CHANNEL enumerator.
+ * xor_type - One of three: XOR, CRC32 and DMA operations.
+ * xor_chain_ptr - address of chain pointer
+ *
+ * OUTPUT:
+ * None.
+ *
+ * RETURS:
+ * MV_BAD_PARAM if parameters to function invalid, MV_OK otherwise.
+ *
+ */
+int mv_xor_transfer(u32 chan, int xor_type, u32 xor_chain_ptr)
+{
+ u32 tmp;
+
+ /* Parameter checking */
+ if (chan >= MV_XOR_MAX_CHAN) {
+ debug("%s: ERR. Invalid chan num %d\n", __func__, chan);
+ return MV_BAD_PARAM;
+ }
+
+ if (MV_ACTIVE == mv_xor_state_get(chan)) {
+ debug("%s: ERR. Channel is already active\n", __func__);
+ return MV_BUSY;
+ }
+
+ if (0x0 == xor_chain_ptr) {
+ debug("%s: ERR. xor_chain_ptr is NULL pointer\n", __func__);
+ return MV_BAD_PARAM;
+ }
+
+ /* Read configuration register and mask the operation mode field */
+ tmp = reg_read(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan)));
+ tmp &= ~XEXCR_OPERATION_MODE_MASK;
+
+ switch (xor_type) {
+ case MV_XOR:
+ if (0 != (xor_chain_ptr & XEXDPR_DST_PTR_XOR_MASK)) {
+ debug("%s: ERR. Invalid chain pointer (bits [5:0] must be cleared)\n",
+ __func__);
+ return MV_BAD_PARAM;
+ }
+
+ /* Set the operation mode to XOR */
+ tmp |= XEXCR_OPERATION_MODE_XOR;
+ break;
+
+ case MV_DMA:
+ if (0 != (xor_chain_ptr & XEXDPR_DST_PTR_DMA_MASK)) {
+ debug("%s: ERR. Invalid chain pointer (bits [4:0] must be cleared)\n",
+ __func__);
+ return MV_BAD_PARAM;
+ }
+
+ /* Set the operation mode to DMA */
+ tmp |= XEXCR_OPERATION_MODE_DMA;
+ break;
+
+ case MV_CRC32:
+ if (0 != (xor_chain_ptr & XEXDPR_DST_PTR_CRC_MASK)) {
+ debug("%s: ERR. Invalid chain pointer (bits [4:0] must be cleared)\n",
+ __func__);
+ return MV_BAD_PARAM;
+ }
+
+ /* Set the operation mode to CRC32 */
+ tmp |= XEXCR_OPERATION_MODE_CRC;
+ break;
+
+ default:
+ return MV_BAD_PARAM;
+ }
+
+ /* Write the operation mode to the register */
+ reg_write(XOR_CONFIG_REG(XOR_UNIT(chan), XOR_CHAN(chan)), tmp);
+
+ /*
+ * Update the NextDescPtr field in the XOR Engine [0..1] Next Descriptor
+ * Pointer Register (XExNDPR)
+ */
+ reg_write(XOR_NEXT_DESC_PTR_REG(XOR_UNIT(chan), XOR_CHAN(chan)),
+ xor_chain_ptr);
+
+ /* Start transfer */
+ reg_bit_set(XOR_ACTIVATION_REG(XOR_UNIT(chan), XOR_CHAN(chan)),
+ XEXACTR_XESTART_MASK);
+
+ return MV_OK;
+}
+
+/*
+ * mv_xor_state_get - Get XOR channel state.
+ *
+ * DESCRIPTION:
+ * XOR channel activity state can be active, idle, paused.
+ * This function retrunes the channel activity state.
+ *
+ * INPUT:
+ * chan - the channel number
+ *
+ * OUTPUT:
+ * None.
+ *
+ * RETURN:
+ * XOR_CHANNEL_IDLE - If the engine is idle.
+ * XOR_CHANNEL_ACTIVE - If the engine is busy.
+ * XOR_CHANNEL_PAUSED - If the engine is paused.
+ * MV_UNDEFINED_STATE - If the engine state is undefind or there is no
+ * such engine
+ *
+ */
+int mv_xor_state_get(u32 chan)
+{
+ u32 state;
+
+ /* Parameter checking */
+ if (chan >= MV_XOR_MAX_CHAN) {
+ debug("%s: ERR. Invalid chan num %d\n", __func__, chan);
+ return MV_UNDEFINED_STATE;
+ }
+
+ /* Read the current state */
+ state = reg_read(XOR_ACTIVATION_REG(XOR_UNIT(chan), XOR_CHAN(chan)));
+ state &= XEXACTR_XESTATUS_MASK;
+
+ /* Return the state */
+ switch (state) {
+ case XEXACTR_XESTATUS_IDLE:
+ return MV_IDLE;
+ case XEXACTR_XESTATUS_ACTIVE:
+ return MV_ACTIVE;
+ case XEXACTR_XESTATUS_PAUSED:
+ return MV_PAUSED;
+ }
+
+ return MV_UNDEFINED_STATE;
+}
+
+/*
+ * mv_xor_cmd_set - Set command of XOR channel
+ *
+ * DESCRIPTION:
+ * XOR channel can be started, idle, paused and restarted.
+ * Paused can be set only if channel is active.
+ * Start can be set only if channel is idle or paused.
+ * Restart can be set only if channel is paused.
+ * Stop can be set only if channel is active.
+ *
+ * INPUT:
+ * chan - The channel number
+ * command - The command type (start, stop, restart, pause)
+ *
+ * OUTPUT:
+ * None.
+ *
+ * RETURN:
+ * MV_OK on success , MV_BAD_PARAM on erroneous parameter, MV_ERROR on
+ * undefind XOR engine mode
+ *
+ */
+static int mv_xor_cmd_set(u32 chan, int command)
+{
+ int state;
+
+ /* Parameter checking */
+ if (chan >= MV_XOR_MAX_CHAN) {
+ debug("%s: ERR. Invalid chan num %d\n", __func__, chan);
+ return MV_BAD_PARAM;
+ }
+
+ /* Get the current state */
+ state = mv_xor_state_get(chan);
+
+ /* Command is start and current state is idle */
+ if ((command == MV_START) && (state == MV_IDLE)) {
+ reg_bit_set(XOR_ACTIVATION_REG(XOR_UNIT(chan), XOR_CHAN(chan)),
+ XEXACTR_XESTART_MASK);
+ return MV_OK;
+ }
+ /* Command is stop and current state is active */
+ else if ((command == MV_STOP) && (state == MV_ACTIVE)) {
+ reg_bit_set(XOR_ACTIVATION_REG(XOR_UNIT(chan), XOR_CHAN(chan)),
+ XEXACTR_XESTOP_MASK);
+ return MV_OK;
+ }
+ /* Command is paused and current state is active */
+ else if ((command == MV_PAUSED) && (state == MV_ACTIVE)) {
+ reg_bit_set(XOR_ACTIVATION_REG(XOR_UNIT(chan), XOR_CHAN(chan)),
+ XEXACTR_XEPAUSE_MASK);
+ return MV_OK;
+ }
+ /* Command is restart and current state is paused */
+ else if ((command == MV_RESTART) && (state == MV_PAUSED)) {
+ reg_bit_set(XOR_ACTIVATION_REG(XOR_UNIT(chan), XOR_CHAN(chan)),
+ XEXACTR_XERESTART_MASK);
+ return MV_OK;
+ }
+ /* Command is stop and current state is active */
+ else if ((command == MV_STOP) && (state == MV_IDLE))
+ return MV_OK;
+
+ /* Illegal command */
+ debug("%s: ERR. Illegal command\n", __func__);
+
+ return MV_BAD_PARAM;
+}